BBS:      TELESC.NET.BR
Assunto:  More on the search for the mafic spell
De:       The Natural Philosopher
Data:     Wed, 14 Jan 2026 21:00:34 +0000
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If you recall I was after a configuration that would allow a Pi 4 or 5 
to act in addition to its generic operation as a server on the network, 
to also act as a wifi access point.

I have *sort of* succeeded.

The general process is to down the wifi and Ethernet interfaces, create 
a bridge interface as master and slave the two other interfaces (Thernet 
and wifi) to it

The bridge interface has all the IP stuff attached to it.

The Wifi interface has instructions to be an access point and have an 
SSID, securitry and so on.


Ultimately I discovered that all this does is create and edit files in

/etc/NetworkManager/system-connections and frankly this is probably the 
easiest way to do it

Here are the three files I created via nmcli

# more br0.nmconnection
[connection]
id=br0
uuid=db3fc586-63b4-43f6-9cf3-efd207086553
type=bridge
interface-name=nm-bridge
timestamp=1768417618

[ethernet]

[bridge]
stp=false

[ipv4]
address1=192.168.0.101/24,192.168.0.254
dns=192.168.0.101;
method=manual

[ipv6]
addr-gen-mode=default
method=disabled

[proxy]


-----------------------------------

# more Garden.nmconnection
[connection]
id=Garden
uuid=f977bba8-bda3-404b-89c3-57c959c8b1fd
type=wifi
interface-name=wlan0
master=db3fc586-63b4-43f6-9cf3-efd207086553
slave-type=bridge
timestamp=1768410601

[wifi]
band=bg
channel=9
mode=ap
powersave=2
ssid=MyGarden

[wifi-security]
key-mgmt=wpa-psk
psk=rottenRatz

[bridge-port]
--------------------------------------------------------------------

# more Ethernet.nmconnection
[connection]
id=Ethernet
uuid=4a8b7eb6-678a-47e2-b5b2-416cc800438f
type=ethernet
interface-name=eth0
master=db3fc586-63b4-43f6-9cf3-efd207086553
slave-type=bridge
timestamp=1768409686

[ethernet]

[bridge-port]

---------------------------------------------------------------------------
Now for the problems:

First of all I cant get the Pi4B to do more than 72Mbps. I *think* this 
is a hardware limit

More importantly if  any connected wifi clients try to use the 
*internet*, response is flaky as fuck. 50%+  packet loss

But wifi clients connected via the Pi WiFi  can access the *LAN* 
smoothly. No packet loss.

Wifi clients attached via any other access point can access the internet 
smoothly.

Just not *wifi clients attached via the pi*....

I am struggling to understand how a device can access the LAN perfectly 
but not the Internet.

Any ideas?

-- 
Future generations will wonder in bemused amazement that the early 
twenty-first century?s developed world went into hysterical panic over a 
globally average temperature increase of a few tenths of a degree, and, 
on the basis of gross exaggerations of highly uncertain computer 
projections combined into implausible chains of inference, proceeded to 
contemplate a rollback of the industrial age.

Richard Lindzen

--- PyGate Linux v1.5.2
 * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)

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[Voltar]